when there's nothing that should be done. To this end:
Make sure Make makes progress when bin/pip is newer than bin/buildout
Make sure Make makes progress when bin/sassc is newer than
manoseimas/widget/frontend/.done (by avoiding recursive make invocations,
because the widget Makefile doesn't know nor care about bin/sassc).
My goal is to see
when there's nothing that should be done. To this end: